A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.
Classification: Zirconium and articles thereof nesoi
NSN 4140-01-121-0876
NSN 5965-01-241-0553
NSN 4140-00-732-9427
NSN 6650-01-527-0465
NSN 5930-01-357-5596
NSN 5950-00-223-0041
NSN 5920-00-243-9506
NSN 5915-00-376-9388
NSN 5985-00-103-7019
NSN 6130-01-614-0375
NSN 5905-01-590-4698
NSN 5996-01-211-8067